Ronaldo has admitted that he still blames Hector Cuper for his departure from Internazionale.
The Brazilian ace left Inter in 2002 to join Real but has always spoken fondly of his time in Italy.
He remains grateful to Inter president Massimo Moratti for his support during his five, injury-prone years at Inter.
But, although he admits that money played a part in his decision to leave for Madrid, Ronaldo also revealed that his relationship with former Inter coach, Hector Cuper, had beecome unworkable.
“I left Inter because, with him (Cuper), there wasn’t any feeling, I couldn’t work with him,” Ronaldo told Corriere della Sera.
“He wasn’t able to give the team a winning mentality. In time, I was confirmed right.
“I was really sorry for Massimo Moratti and the supporters but it was an obliged choice. Inter are still in my heart.
“It’s true I left because Real offered me more money but with president Moratti there have never been any problems.
“I have a good relationship with him, he has been an important presence in my life.
“He did a lot to take me to Inter and I’m thankful.”
Ronaldo also admitted that he would relish the prospect of playing alongside compatriot Adriano at the Bernabeu.
“Who would I want from Inter here in Madrid? Certainly Adriano,” added the Brazilian.
“He’s really strong. It would be beautiful to have him here.
“Cuper never allowed us to play together and we could do a lot.”